Enabling Quality of Service with Cisco SDN. Jon Snyder

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2 Enabling Quality of Service with Cisco SDN Jon Snyder

3 Agenda Introduction SDN: What Do We Mean, and What s the Point? Background Collaboration Applications and the Network SDN and APIC-EM Network Configuration and EasyQoS Dynamic QoS SDN-Assisted Troubleshooting Conclusion

4 Objectives Describe some applications of SDN being developed to improve collaboration: Simplify network configuration needed for collaboration Operate network using application input Identify media flow-related problems Help network engineers understand real value of SDN for collaboration Fast, predictable, programmatic network configuration Dynamic capabilities not possible before

5

6 The Real Value of SDN Changing Network Software Coding Styles Utilise Programmatically Linked Interfaces REST API Semantically linked interfaces allow abstraction layers to change while maintaining the stack integrity SAL Customer Flexibility Enables Use Case Evolution + Investment Protection Vendor Flexibility Allows Various Components to mature over time while preserving interoperability

7 APIC-EM for LAN/WAN SECURITY COLLABORATION SERVICES ORCHESTRATION WAN REST API APIC-EM SOUTHBOUND ABSTRACTION LAYER CATALYST NEXUS ISR ASR ASA WIRELESS NON CISCO NETWORK ELEMENTS

8 Applications of APIC-EM Supporting Collaboration Collaboration Applications Network Configuration (EasyQoS) Flow Management (Cisco Unified CM) Flow Analysis (Cisco Prime Collaboration) Enterprise Services APIC EM Inventory and State Identity and Location REST APIs Application Awareness Elastic Infrastructure SAL Network Devices Policy Enforcement

9 APIC-EM Supported Devices ISR-G2 ISR-4000 ASR1K ASR9K CSR 1000v 3560CG SM Etherswitch modules Industrial 2000/ S/X/XR 3650/ X/3750-X 4500/4500x/ /6800 Nexus 5k/7k Wireless Controllers (IOS XE and AireOS)

10 Collaboration and the Network Collaboration applications have always been close to the network CDP for endpoint identification Call admission control and locations SDN tightens the integration

11 QoS Management in the Network

12 Quality of Service for Collaboration The Media-Network Relationship Unified CM APIC-EM Prime Collaboration Assurance EF AF41 BE WAN Express Business Intent and Deploy Policies Identify Media Classify & Schedule Resource Control Monitor Troubleshoot Optimise

13 Network Configuration for QoS QoS is a means to an end Which business applications matter to the organisation? Give them priority Setting QoS in the network is a chore Devices have different numbers of hardware queues, etc. Lots of CLI to identify and mark flows Best practices difficult to implement (Cisco CVD is a large book) Network

14 Easy QoS App for APIC-EM Network-wide QoS configuration from one interface

15 QoS Policy Abstraction Enables Separation of Business Intent Strategic vs. Tactical Strategic QoS Policy (WHAT you want to do) reflects business intent not constrained by any technical or administrative limitation is end-to-end Tactical QoS Policy (HOW it gets done) adapts the strategic business intent to the platform s capabilities is limited by various tactical constraints, including: Protocol constraints (e.g. the WLAN has only 4 levels of service [access categories]) Platform constraints (e.g. a Catalyst 3750 has only 4 hardware queues) Interface constraints (e.g. a T1 WAN link has limited bandwidth) Role constraints (e.g. a CE link may need to map into a reduced sub-set of SP Classes-of-Service)

16 APIC-EM Operation for QoS Deployment Deploy Tactical Static QoS Policies User enters strategic business Intent to APIC-EM APIC-EM deploys: 1. static (ingress) classification policies on access edges APIC-EM

17 APIC-EM Operation for QoS Deployment Deploy Tactical Static QoS Policies User enters strategic business Intent to APIC-EM APIC-EM deploys: 1. static (ingress) classification policies on access edges 2. static (ingress and egress) queuing policies APIC-EM

18 Benefits Focuses QoS discussion on business intent what, not how Automates the deployment of QoS rules into the network Understands and maps various network element limitations Automates various best practices for QoS management Remember the CVD and its hundreds of pages? It s baked in.

19 Dynamic QoS

20 Cisco Unified Communications Manager Cisco Unified Communications Manager On Premises Hybrid Cloud

21 Session Management 101 Registration (SIP) initialisation Call Signalling (SIP) contains media addresses (SDP) Media flows (RTP) unidirectional, per-media-type

22 QoS for Media Flows We can do QoS today. Why change? QoS settings can be specified in a variety of ways: configuration files, Windows Group Policy, etc. Difficult to manage Network operators often do not trust PC/mobile endpoint QoS settings So they remark all PC/mobile traffic to best effort Can reduce session quality Unmanaged and hybrid (communications and data) devices are becoming more common Which VLAN to use? Trust their QoS settings?

23 QoS Marking Via APIC-EM Unified CM APIC-EM 1. Endpoints signal call setup to Unified CM 2. Unified CM extracts media addresses from call signalling 3. Unified CM requests QoS setting policy on flows from APIC EM 4. APIC EM instructs switch to apply DSCP according to policy Applies to any selected SIP endpoint or trunk; no endpoint action is needed

24 Configuration in CUCM Identify which endpoints require dynamic QoS Typically only needed for softclients. Hard phones may already have trust extended to them at the switch port Ensure that a SIP Profile with the Dynamic QoS option enabled is applied to the required endpoints Only calls involving endpoints with a SIP Profile where this option is enabled will have their information sent to APIC-EM *May not represent final UI

25 Configuration Import APIC-EM HTTPS certificate if not already trusted by Unified CM Otherwise, CUCM won t be able to talk to APIC-EM Enter APIC-EM details under Call Routing, HTTP Profile* *Menu wording may change in final release Set Cluster wide External QoS Enabled Service Parameter to True This is the global enable switch for the feature. Without it, nothing takes effect APIC-EM

26 Details Unified CM updates APIC-EM as calls change Hold, transfer, conference, drop Uses IP addresses as seen by Unified CM Gateways Phones If APIC-EM is not available, call proceeds as best effort APIC-EM has a horizontal scalability and fault-tolerance architecture You might have a question about stale policies now clientreference and node restart procedures to prevent this Available in the 2 nd half of calendar year 2016

27 Benefits QoS enablement does not require endpoint cooperation or trust Perfect for soft clients like Jabber No more port-range matching. Elegant trust solution Reduces number of places where QoS settings are managed Unified CM and APIC-EM manage QoS for collaboration flows

28 Media Flow Troubleshooting

29 Identifying and Resolving Problems

30 So What s the Problem for Collaboration?? How Do We Differentiate WAN Between all this RTP Traffic? EX90 RTP (Different Video, Audio and Desktop Share) Media Streams Where do the flows go? How do we Troubleshoot?

31 Cisco Prime Collaboration Assurance Video Assurance features End-to-End Monitoring View all sessions scheduled, completed, or in progress. Check Session Statistics Jitter and Packet Loss See end point details Real-Time Diagnostics Conduct Path Trace to view CPU, memory, and interface statistics to locate bottlenecks in the network. Conduct Path Assessment to reveal potential configuration issues Video Test Call Ensure end-to-end service experience using Video Test call ahead of important upcoming meeting

32 APIC-EM Path Trace APIC-EM traces network paths L2 and L3 devices from source to destination Provides rapid visibility Assists in design and troubleshooting

33 Prime Collaboration Assurance Interaction with APIC-EM Prime Collaboration Assurance APIC-EM Perfmon Perfmon Perfmon Perfmon 1. Initiate an APIC EM Path Visualisation Using IP source and destination 1. Request media path 2. Request media flow statistics 2. Collect statistics from endpoints

34 Media Flows in Prime Collaboration Assurance SDN Path View SDN Path View

35 Details Path determination will be done periodically, so any change in path will be reflected in topology Prime gets media stats (loss, jitter, delay) and CPU, Memory stats from Controller periodically Available in the 2 nd half of calendar year 2016

36 Benefits Lower OPEX: Find the root cause of the media quality problem quickly Better Quality: Improves quality of media diagnostics Faster Diagnosis and Remedy: Expands reach of diagnostics

37 Deployment Details

38 Deployment REST over HTTPS Unified CM APIC-EM Prime Collaboration Assurance APIC-EM: software on virtual platform Scales horizontally Discovers network from address seeds

39 Deployment Horizontal scaling supports software fault tolerance Spin up a new service when one fails Carefully tuning CLI to devices to optimise device performance e.g. TCAM Scalability (calls per second, etc.) TBD APIC-EM performance Network element performance

40 API Flow 1001 calls 2001 Once CUCM knows media addresses and ports, informs APIC-EM via POST to /api/v1/flow: {"srcipaddress":" ","dstipaddress":" ","srcport":38492,"dstport":39608,"mediatyp e":"video","qosclassname":"conversational.video.avconf.aq", "averagebandwidth":0, "peakbandwidth":0, clientreference":"cluster7-unique-id","codec":"h.264 } APIC-EM responds with a flow ID: {"response":{"data":"success","flowid":"bc8727b7-76d0-4bac-94b9- fa6b76a1a803"},"version":"0.0"} And it proceeds to set up QoS marking for the flow on the relevant network devices When the call is over, CUCM tells APIC-EM via DELETE to /api/v1/flow/bc8727b7-76d0-4bac-94b9-fa6b76a1a803 And APIC-EM removes the marking from the network devices

41 A Note About APIC-EM APIs Open & fully documented DevNet w/ step-by-step tutorials Automate manual processes Abstracts the network via REST interfaces Read and/or write Sky s the limit

42 Additional Sessions BRKRST APIC-EM BRKRST The QoS Paradigm Shift BRKCRS Campus QoS Design-Simplified BRKRST QoS Design and Deployment for Wireless LANs BRKSDN Programming Device APIs BRKUCC Accelerate and Assure Collaboration Deployments with Cisco Prime Collaboration

43 Conclusion These examples show value of APIC-EM for Collaboration Applications Begin your Exploration Today Attend additional sessions Visit Build a lab where you can see SDN in action

44 Continue the Conversation using Cisco Spark Enabling Quality of Service with Cisco SDN Sign up free for Cisco Spark at Download the application from ios App Store, Google Play Store, or from Visit the World of Solutions Cisco Spark area for demos Use Cisco Spark to continue the conversation or ask any additional questions with the speaker for this session. The room name is BRKCOL-2616 How to get added to the Cisco Spark room for this session To opt in, send an to with the message Please add me to the BRKCOL-2616 room

45 Participate in the My Favorite Speaker Contest Promote Your Favorite Speaker and You Could Be a Winner Promote your favorite speaker through Twitter and you could win $200 of Cisco Press products (@CiscoPress) Send a tweet and include Your favorite speaker s Twitter Two hashtags: #CLUS #MyFavoriteSpeaker You can submit an entry for more than one of your favorite speakers Don t forget to View the official rules at

46 Continue Your Education Demos in the Cisco campus Walk-in Self-Paced Labs Table Topics Meet the Engineer 1:1 meetings Related sessions

47 Q & A

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